mcs/class/System.Web/System.Web.Configuration_2.0/MachineKeySection.cs

   1 //
   2 // System.Web.Configuration.MachineKeySection
   3 //
   4 // Authors:
   5 //      Chris Toshok (toshok@ximian.com)
   6 //
   7 // (c) Copyright 2005 Novell, Inc (http://www.novell.com)
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System;
  32 using System.ComponentModel;
  33 using System.Configuration;
  34 using System.Security.Cryptography;
  35
  36 #if NET_2_0
  37
  38 namespace System.Web.Configuration {
  39
  40         public sealed class MachineKeySection : ConfigurationSection
  41         {
  42                 static ConfigurationProperty decryptionProp;
  43                 static ConfigurationProperty decryptionKeyProp;
  44                 static ConfigurationProperty validationProp;
  45                 static ConfigurationProperty validationKeyProp;
  46                 static ConfigurationPropertyCollection properties;
  47
  48                 static MachineKeySection ()
  49                 {
  50                         decryptionProp = new ConfigurationProperty ("decryption", typeof (string), "Auto",
  51                                                                     PropertyHelper.WhiteSpaceTrimStringConverter,
  52                                                                     PropertyHelper.NonEmptyStringValidator,
  53                                                                     ConfigurationPropertyOptions.None);
  54                         decryptionKeyProp = new ConfigurationProperty ("decryptionKey", typeof (string), "AutoGenerate,IsolateApps",
  55                                                                        PropertyHelper.WhiteSpaceTrimStringConverter,
  56                                                                        PropertyHelper.NonEmptyStringValidator,
  57                                                                        ConfigurationPropertyOptions.None);
  58                         validationProp = new ConfigurationProperty ("validation", typeof (MachineKeyValidation), MachineKeyValidation.SHA1,
  59                                                                     new MachineKeyValidationConverter (),
  60                                                                     PropertyHelper.DefaultValidator,
  61                                                                     ConfigurationPropertyOptions.None);
  62                         validationKeyProp = new ConfigurationProperty ("validationKey", typeof (string), "AutoGenerate,IsolateApps",
  63                                                                        PropertyHelper.WhiteSpaceTrimStringConverter,
  64                                                                        PropertyHelper.NonEmptyStringValidator,
  65                                                                        ConfigurationPropertyOptions.None);
  66
  67                         properties = new ConfigurationPropertyCollection ();
  68
  69                         properties.Add (decryptionProp);
  70                         properties.Add (decryptionKeyProp);
  71                         properties.Add (validationProp);
  72                         properties.Add (validationKeyProp);
  73
  74                         AutoGenKeys ();
  75                 }
  76
  77                 [MonoTODO]
  78                 protected override void Reset (ConfigurationElement parentElement)
  79                 {
  80                         base.Reset (parentElement);
  81                 }
  82
  83                 [TypeConverter (typeof (WhiteSpaceTrimStringConverter))]
  84                 [StringValidator (MinLength = 1)]
  85                 [ConfigurationProperty ("decryption", DefaultValue = "Auto")]
  86                 public string Decryption {
  87                         get { return (string) base [decryptionProp];}
  88                         set { base[decryptionProp] = value; }
  89                 }
  90
  91                 [TypeConverter (typeof (WhiteSpaceTrimStringConverter))]
  92                 [StringValidator (MinLength = 1)]
  93                 [ConfigurationProperty ("decryptionKey", DefaultValue = "AutoGenerate,IsolateApps")]
  94                 public string DecryptionKey {
  95                         get { return (string) base [decryptionKeyProp];}
  96                         set { base[decryptionKeyProp] = value;  SetDecryptionKey (value); }
  97                 }
  98
  99                 [TypeConverter (typeof (MachineKeyValidationConverter))]
 100                 [ConfigurationProperty ("validation", DefaultValue = "SHA1")]
 101                 public MachineKeyValidation Validation {
 102                         get { return (MachineKeyValidation) base [validationProp];}
 103                         set { base[validationProp] = value; }
 104                 }
 105
 106                 [TypeConverter (typeof (WhiteSpaceTrimStringConverter))]
 107                 [StringValidator (MinLength = 1)]
 108                 [ConfigurationProperty ("validationKey", DefaultValue = "AutoGenerate,IsolateApps")]
 109                 public string ValidationKey {
 110                         get { return (string) base [validationKeyProp];}
 111                         set { base[validationKeyProp] = value;  SetValidationKey (value); }
 112                 }
 113
 114                 protected override ConfigurationPropertyCollection Properties {
 115                         get { return properties; }
 116                 }
 117
 118 #region CompatabilityCode
 119                 static byte [] autogenerated;
 120                 static byte [] autogenerated_decrypt;
 121                 byte[] decryption_key;
 122                 byte[] decryption_key_192bits;
 123                 byte[] validation_key;
 124
 125                 static void AutoGenKeys ()
 126                 {
 127                         autogenerated = new byte [64];
 128                         RandomNumberGenerator rng = RandomNumberGenerator.Create ();
 129                         rng.GetBytes (autogenerated);
 130                         autogenerated_decrypt = new byte [64];
 131                         rng.GetBytes (autogenerated_decrypt);
 132                 }
 133
 134                 static byte ToHexValue (char c, bool high)
 135                 {
 136                         byte v;
 137                         if (c >= '0' && c <= '9')
 138                                 v = (byte) (c - '0');
 139                         else if (c >= 'a' && c <= 'f')
 140                                 v = (byte) (c - 'a' + 10);
 141                         else if (c >= 'A' && c <= 'F')
 142                                 v = (byte) (c - 'A' + 10);
 143                         else
 144                                 throw new ArgumentException ("Invalid hex character");
 145
 146                         if (high)
 147                                 v <<= 4;
 148
 149                         return v;
 150                 }
 151
 152                 internal static byte [] GetBytes (string key, int len)
 153                 {
 154                         byte [] result = new byte [len / 2];
 155                         for (int i = 0; i < len; i += 2)
 156                                 result [i / 2] = (byte) (ToHexValue (key [i], true) + ToHexValue (key [i + 1], false));
 157
 158                         return result;
 159                 }
 160
 161                 static byte [] MakeKey (string key, bool decryption) //, out bool isolate)
 162                 {
 163                         if (key == null || key.StartsWith ("AutoGenerate")){
 164                                 //isolate = key.IndexOf ("IsolateApps") != 1;
 165
 166                                 return (decryption) ? autogenerated_decrypt : autogenerated;
 167                         }
 168
 169                         //isolate = false;
 170
 171                         int len = key.Length;
 172                         if (len < 40 || len > 128 || (len % 2) == 1)
 173                                 throw new ArgumentException ("Invalid key length");
 174
 175                         return GetBytes (key, len);
 176                 }
 177
 178                 internal void SetDecryptionKey (string n)
 179                 {
 180                         decryption_key = MakeKey (n, true); //, out isolate_decryption);
 181                         decryption_key_192bits = new byte [24];
 182                         int count = 24;
 183                         if (decryption_key.Length < 24)
 184                                 count = decryption_key.Length;
 185                         Buffer.BlockCopy (decryption_key, 0, decryption_key_192bits, 0, count);
 186                 }
 187
 188                 internal void SetValidationKey (string n)
 189                 {
 190                         validation_key = MakeKey (n, false); //, out isolate_validation);
 191                 }
 192
 193                 internal byte [] ValidationKeyBytes {
 194                         get {
 195                                 if (validation_key == null)
 196                                         SetValidationKey (ValidationKey);
 197                                 return validation_key;
 198                         }
 199                 }
 200
 201                 internal byte [] DecryptionKeyBytes {
 202                         get {
 203                                 if (decryption_key == null)
 204                                         SetDecryptionKey (DecryptionKey);
 205                                 return decryption_key;
 206                         }
 207                 }
 208
 209                 internal byte [] DecryptionKey192Bits {
 210                         get {
 211                                 if (decryption_key_192bits == null)
 212                                         SetDecryptionKey (DecryptionKey);
 213                                 return decryption_key_192bits;
 214                         }
 215                 }
 216 #endregion
 217
 218         }
 219 }
 220
 221 #endif